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CC2640R2F-Q1: FFT Implementation / CMSIS usage

Part Number: CC2640R2F-Q1
Other Parts Discussed in Thread: CC2640

Hello,

This may sound as a dumb question and sorry if it is but it would be dumber from me to not ask it.

I'm trying to implement an FFT on some accelerometer readings acquired through I2C to know the frequency of vibration of a device. I did some research on this forum and some people stated to use any FFT lib available for Cortex-M3 processors online and I managed to find some of them that seems pretty solid. They require to add CMSIS libraries in order for them to have the math functions needed and that's where I have found some problems. I downloaded the .pack provided by ARM but have no idea on how to add them to CCS project or how to do the installation process from CCS. Is there any app note on how to do this? Has anyone successfully implemented a FFT algorithm (256 samples) on CC2640 that could tell me where did they get the lib or functions?

Just before someone hops and tells me that I may find some memory problems to fit the libs and BLE stack at the same time on CC2640, if that may be the case I have some CC2642 ready to be used since I can port my application to that MCU if needed but I'd rather try to have it working on CC2640 before starting a porting project to CC2642.

Best regards and thanks in advance for any appreciated help.